The Grand Kessel River Valley was a rock formation on Kessel. Trioculus once disciplined a rebellious settlement in the Valley by firing a C-136 "Grandfather Gun" into a river dam. The entire settlement flooded, drowning the rebels.

Behind the scenesEdit

The presence of a river valley on arid Kessel, where most surface water simply sublimes into vapor, seems impossible. However, the exact nature of Kesselian ecology is indeterminate. (See: Kessel: Behind the scenes).